20 Most Recent Ricoh Aficio 2022 All-In-One Laser Printer - Page 5 Questions & Answers

kindly check your drum life.if your drum life expire then replace the drum unit.your problem will solved

SC901 is a problem with the copier's mechanical counter. Either the counter is bad, the board that it interfaces with is faulty, or there is a problem in the connection between the two.

Other than providing an incorrect count, this error shouldn't keep you from using the copier. If it does, it shouldn't be expensive to have the counter replaced.

Hope that helps!

This error appears when you have problems with TERMISTORS in fusing unit. You have to replace termistors if you can't reset the service call condition in service mode.
pifonski

Photo conductor unit is the drum unit inside the copier . It contains developer and toner which are the ink as some people refer to it. It is a consumable part and needs to be replaced every 60k copies but can and dies last longer. You can ignore it and once copy quality is ok I wouldnt bother changing it but you will eventually need to replace it.

SC 546: Unstable fusing temperature

Symptom: The fusing temperature does not rise
3 °C or more within 5 seconds after the
fusing lamp has been on over 8
seconds.

Possible Cause: • Thermistor defective
• Power supply unit defective